Here is the problem, Sony uses the same software on all of its new sets from top teir to budget(like yours) The 810C as much as you wont want to hear is part of the budget/economy line of Sony. With that said while the android software is the same it doesn't have all the bells and whistles like the 850c and above have. That remote is one of them. The voice mode is part of the Android package by default because its the same android package like used on a phone or a tablet just made for TVs. Sony did not program any of it but did build a remote for it for the higher end sets. The Launcher that the TV uses is called "Android TV" and can be found on the google play store and used on any TV that has android and will have the same voice search feature as your sony even if the tv it was put on had not been intended for it.

Think about new cars, a base model lets say doesn't have fog lights but instead has black caps in the bumper where they would go. The higher end trim package of the same car does have the fog lights. The base model will still usually have the wiring pinned up behind those caps for fog lights even though it did not come with them because they were using the same base model for every version.

If you are using this for a TV i would not recommend the 10 because the spectrum of sound does not sound as defined as the 20. I use the 10 as a PC speaker and had to do alot of config on my PC EQ to get the sound balanced. The 20 has MUCH more balance out of the Box and can cover a much better spectrum of sound which would be better for TV/Movies.